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Takahashi Lab
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A materials strength lab that improves the reliability of materials used in energy equipment and automobiles.
AboutAbout the lab
Exploring the reliability and high performance of materials
The Takahashi Lab studies how to improve the reliability and performance of structural materials used in energy equipment, chemical plants, automobiles, and aircraft.
Building on materials science and mechanics of materials, the lab addresses problems such as material fatigue and surface cracks.
On the lab's website, it is introduced under the name "Energy Equipment Materials Lab."
Key terms
- Fatigue strength
- The strength to resist failure even under repeated stress. It is required for large steel structures and components of transportation equipment.
- Compressive residual stress
- A compressive force that remains inside a material after processing. Introducing it can make surface defects and cracks harmless in terms of strength.
- Peening
- A treatment that introduces compressive residual stress into a material. Examples include laser peening and shot peening.
NewsLab news
A student received the Outstanding Poster Award at the Japan Society for Spring Research
A student received the Outstanding Presentation Award at the Surface Modification Symposium of the Society of Materials Science, Japan
A student received the Outstanding Poster Award at the Japan Society for Spring Research
ResearchResearch themes
The lab aims to improve the reliability and performance of materials used in energy equipment and automobiles. Building on materials science and mechanics of materials, it tackles cracks in ceramics and fatigue in metals.
*Illustrative imageSelf-Healing of Cracks in Ceramics
Ceramics have excellent high-temperature strength and corrosion resistance, but their strength drops sharply because of surface cracks, which limits where they can be used. Aiming for materials that can self-heal cracks formed during machining or in service, the lab is currently studying how to improve the strength and reliability of ceramics made with 3D printers.
*Illustrative imageImproving the Fatigue Strength of 3D-Printed Metals
In 3D additive manufacturing, defects form during the build and lower fatigue strength, which is a problem. By introducing compressive residual stress through laser peening, the lab succeeded in improving the fatigue strength of additively manufactured materials.
*Illustrative imageImproving the Fatigue Strength of Steel and Rendering Surface Cracks Harmless
Making transportation equipment lighter requires higher-strength components, but the stronger the steel, the more sensitive it becomes to surface defects. The lab showed that compressive residual stress introduced by methods such as shot peening can render surface defects harmless.
*Illustrative imageImproving the Fatigue Strength and Extending the Life of Welded Joints
In large steel structures such as bridge piers, fatigue cracks can start at welds. The lab is developing a technique that uses a portable peening device to render fatigue cracks in welds harmless and extend service life.
MembersFaculty
The Takahashi Lab's members consist of faculty, doctoral, master's, and undergraduate students, technical assistants, and administrative assistants.As of 2025
- ProfessorKoji Takahashi
VoicesStudent voices
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Report an errorAbout the images
The top and research theme images are illustrative and were not taken at the lab. They are cropped from Wikimedia Commons images. Cropped CC BY-SA images are provided under the same CC BY-SA license as the original (version shown on each line).
- Top image: “Pedalarm Bruch” Lokilech / CC BY-SA 3.0 (cropped)
- Self-Healing of Cracks in Ceramics: “MHD MAGNETIC HYDRODYNAMICS TEST SECTION SHOWING DETAILS OF MELTED COPPER AND CRACKS IN CERAMIC - NARA - 17476634” 作者不詳 / Public domain (cropped)
- Improving the Fatigue Strength of 3D-Printed Metals: “Material properties of metal powders for use in additive manufacturing ( )” National Institute of Standards and Technology / Public domain (cropped)
- Improving the Fatigue Strength of Steel and Rendering Surface Cracks Harmless: “GRC-2003-C-02070~orig” NASA GRC / Public domain (cropped)
- Improving the Fatigue Strength and Extending the Life of Welded Joints: “Friction welding joint” Shanjeevi. C, Satish Kumar. S, Sathiya.P / CC BY-SA 4.0 (cropped)
- Related lab (Kanai Lab): “Colloid” KarlGaff / CC BY 4.0 (cropped)
- Related lab (Matsuzawa Lab): “Superheroes of our time” Gn.zhigerbayeva / CC BY-SA 4.0 (cropped)
- Related lab (Ordered Porous Materials Lab): “(Zeolite crystals close-up in Bishop Museum, United States) - DPLA - a0d1c0c866652e4e7f3ad2cc24ee66a0” Carlquist, Sherwin John / CC BY 4.0 (cropped)
- Related lab (Matsumiya Lab): “Solvent extraction plant-distillation section” Palagiri / CC BY-SA 3.0 (cropped)
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